Acid Potassium Chloride Zinc Electroplating Brightener

High content: good conductivity, small resistance, good dispersion ability, anode is not easy to passivation. Too high: there will be crystallization in winter, little improvement on the electroconductivity of the bath. Low content: the concentration of potassium chloride is too low, not only the conductivity is poor, and the dispersion ability is reduced, the coating brightness is poor, but also affect the range of cathode current density Potassium chloride has weak complexation on zinc.

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Description

Boric Acid H3BO3

The main function of boric acid H3BO3 is to inhibit the increase of PH value of the bath, so that the bath PH value remains relatively stable, and the coating can be uniform and bright. When boric acid content is insufficient, the range of cathode current density will be reduced, the current is not open, the coating is easy to burn, resulting in rough gray coating and loss of light. In order to stabilize PH value of bath, it is necessary to maintain proper boric acid content. But the boric acid content should not be too high, if the content is too high, the coating will blossom, so at the general temperature, more than 45g/L will crystallize and precipitate. So the appropriate boric acid content is 30-40g/L, winter to take 30g/L is appropriate, summer boric acid content can be increased to 35-40g/L.

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